Method of fabricating tips for torches



July 26, 1932. A. F. JENKINS METHOD OF FABRICATING TIPS FOR TORCHES Filed Dec. 4, 1951 Patented Jul 25, 1932 y I 1,869,260

UNITED STATES PATENT OFF-ICE ALEXANDER F. JENKINS, OF BALTIMORE, MARYLAND METHOD OF FABRICATING TIPS FOR 'IOB-CHES Application filed December 4, 1931. Serial No. 579,032. I

This invention relates to methods of fabri- Figure 4 is a plan view of the seating sureating tips for cutting or welding torches and face of the completed tip; -particularly to methods of making tips hav- Figure 5' is a section on line 5--5 of Figure ing passages therein for the mixing of com- 3; and I 5 bustible and combustion supporting gases. Figure 6 is an axial section through a tip In the manufacture of welding and -cutting having an insertedring but a slightly diftips, it is generally customary to form in each ferent arrangement of gas passages. a plurallty of conduits for combustible gas Thetip illustrated in Figures 1 ms, in-

so that a serles of jets of combustible gas may elusive, comprises a main or body portion 10 erally also these conduits are disposed sages, the central passage 11 being in this inequidistantly' from each other and equidisstanceprovided for the transmission of cuttantly from theaxis of the tip; that is, they ting oxygen to the discharge end, and the are disposed in a circular series in regular forward end 11' of this passage being rea issue f the discharge endof the tip. Genthrough which extend a plurality of gas pasorder. Finally, for convenience in manustricted as shown. In welding tips,'such pasfacture and efficiency in operation, it is gensages are, of course, omitted. 4 Disposed equierally preferred to have the several outlets distantly from the axis of the tip are a plural of these passages of relatively small size, ity of duets or passages 12 for the transmisthe intermediate portions thereof of relasion of combustible gas' to the discharge end,

" tivelylarge diameter, andthe inlet ends again each of thesepassages having a restricted somewhat restricted. forward portion 12 which is preferably for- In accordance with the present invention,I Wardly inclined toward the oxygen conduit provide a method whereby a tip of this type' discharge port, as shown. The several conmay be easily and cheaply manufactured, duits 12 are disposed in a circular series The invention contemplates the insertion into around the axis of the tip and are also preferm The accompanying drawing includess vwith relatively restricted ports 16 formed an annular groove formed in theseating surably disposed equidistantly from each other, face of the tip of a member provided with a as may be seen-in Figures 4 and 5.

series of restricted apertures therethrough, The seating surface ofthe tip is indicated one such restricted aperture being provided at 13 and may comprise either a fiat circular for each of the conduits in the tip and th surface, such as that shown, or a conical surmember being so inserted as to be frietionally face. In this seating surface 13 are formed retained in position with each of its retwo concentric grooves indicated at 14 and 15' stricted apertures disposed coaxially, or in" p v y, groove 14 being so P c as to register,-with one of the lon itudinal g'as a be intersected by all of the heating or comsages in the main portion 0% insertion of a single member, therefore, all ing disposed just outside of grooveil i. As of the longitudinally extending conduits of Will be een from Flg rc he bottom of the tip are simultaneously restricted at their gro v 1 omp i the annular Outer e d rear or inlet ends. surface of a ring 16, and this ring is provided eral views which disclose the various t 5 therein for the transmisslon ofgas from the f llow d. i th manufa t re of th tip In groove 14 to the several heating gas conduits the drawing: 12, the various ports 16 being in register or Figure 1 is auexploded view of the tip a d axial alignmen't'respectively with the several Figure 2 is an axial section through the tip '17 extends outwardly fromv each such reafter insertion of the ring-likeflrestricting destricted port 16 to the bottom of annular vice; groove 15, each such passage penetrating the I Fi rea3 is a similar section throughthe outer wall of ring 16,- as shown. 'Mixture of nnmn ni-n fin:

the tip. By the bustible gas passages 12, and groove 15 be- 8 the ring just PIlOI' to insertion of the latter; heating gas passages. A diagonal passage p the gases flowing through ports 16 and 17,

therefore, first occurs ports 16'.

The method of assemblin which are formed separate 5 stance, will now be described. An incompleted tip is shown in Figure 1, together with the ring adapted for assembly therewith. The groove in the seating surface '13, which is intended to receive the ring 16, is so formed and so dimensioned that the ring must be necessarily inserted under the influence of a considerable amount of pressure. In inserting the ring, however, care must be taken in order to make certain that the several ports 16 formed therein are in exact register with the corresponding conduits 12 in the tip.

in the lower ends of the tip and ring,

When fully seated in position, the rear end of the ring projects above the seating surface of the tip as shown in F igure 2. The next step is to remove, by a suitable operation, that portion of the ring which projects beyond the seating surface and also a considerable portion thereof which lies below the seating surface, the ring being cut away until its annular outer end surface lies in the position in which it is shown in- Figure 3. This removal of metal may be effected in various ways but preferably by means of a lathe. The ring so positioned is inaccessible and cannot be knocked loose. By reason of the heavy frictional engagement between the walls of the ring and the sides of the groove in which it is placed, it will remain in the position shown indefinitely despite hard usage of the tip. Finally, the groove is turned in the seating surface and the diagonal passages 17 drilled so that the gases which pass from the head of the torch into grooves 14 and 15 respectively are brought together in the restricted channels 16;

In the form of the invention shown in Figure 6, the diagonal gas passages 17 are so drilled that they intersect the enlarged bores 12 below the ring 16, so that mixing first occurs below the rin It is preferred, however. that the diagonal iores intersect the restricted ports 16' in the ring 16, and better mixing results. Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is 1. The method of fabricating a tip for a torch which comprises forming a p rality of substantially parallel ducts in the body thereof, forming a groove in the end of the tip which intersects said ducts, pressing a member into said groove, said member hav ing a plurality of ducts formed therein which register, when said member is finally 0 positioned, with the ducts formed in the 1 body of the tip, the ducts in said member being of less cross-sectional area than the corresponding ducts of the body, and removing by a cutting operation a portion of the outer end of said member until its outer end shi y in the first in-.

surface occupies a predetermined relationb to the adjacent end surface of the tip 2. The method of fabricating a ti for a torch which comprises forming a' p urality of substantially parallel ducts in the body thereof, said ducts being equidi'stantt spaced from a common'axis, nular groove in the end of said body centered on said common axis, said groove intersecting each duct, pressing a cylindrical sleeve into said groove, said sleeve having a plurality of ducts formed therein extending parallel to said axis, the ducts of the sleeve registering with the ducts of the tip body but being of less cross-sectional area, and removing by a cutting operation a portion of the outer end of the sleeve so that its annular outer end surface forms the bottom of said groove.

In testimony whereof hereunto aflix my signature.

ALEXANDER F. JENKINS.

forming an an- 

